Search notes:

ORA-00902: invalid datatype

xyz is not a datatype; 
create table tq84_tab (col xyz);

BOOLEAN in SQL

Booleans are supported in SQL only starting with 23c. In an earlier release, the following function, when selected in an SQL statement, throws an ORA-00902: 
create or replace function tq84_bool
   return boolean
as
   return true;
end tq84_bool;
/

select tq84_bool from dual;

See also

Other Oracle error messages

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/developm...', 1758204143, '216.73.216.150', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/development/databases/Oracle/errors/ORA-00902_invalid-datatype(50): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78